I've never been diabetic or had issues with blood sugar levels in the past.

After 3 months of strict keto and getting blood BHB levels up to 2.2 mmol/L (average 0.8-1.7) I tested my blood glucose in the morning to find a figure of 5.8 mmol/L which is “pre-diabetic”.

I understand that this is seemingly common enough and attributed to physiological insulin resistance of muscle in resting states or the “Randle effect”.

I have to say I am on a holiday and won't be able to have my HbA1c checked for 3 weeks or so.

I really don’t want to risk my health by continuous ketogenic diet if such changes might in some way genuinely increase my risk of becoming carbohydrate intolerant permanently. While I don’t want to eat carbs and have no particular craving I don’t like the idea of my BSL being elevated for significant periods of the day.

I don’t know if the 5.8 mmol/L is cause for concern but it has kind of freaked me out a bit.